<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Get features under the mouse pointer</title>
    <meta
      name="viewport"
      content="initial-scale=1,maximum-scale=1,user-scalable=no"
    />
    <script src="../../lib/mapbox-gl.js"></script>
    <link href="../../lib/mapbox-gl.css" rel="stylesheet" />
    <script src="../../lib/axios.min.js"></script>
    <style>
      body {
        margin: 0;
        padding: 0;
      }
      #map {
        position: absolute;
        top: 0;
        bottom: 0;
        width: 100%;
      }
      #features {
        position: absolute;
        top: 0;
        right: 0;
        bottom: 0;
        width: 50%;
        overflow: auto;
        background: rgba(255, 255, 255, 0.8);
      }
      #map canvas {
        cursor: crosshair;
      }
    </style>
  </head>
  <body>
    <div id="map"></div>
    <pre id="features"></pre>
    <script>
      let baseDataUrl = `http://${localStorage.getItem(
        "host"
      )}/mapbox-gl-js-offline-examples`;
      axios
        .get(
          baseDataUrl +
            `/resources/styles/${localStorage.getItem(
              "mbtilesStylesName"
            )}.json`
        )
        .then((res) => {
          let data = res.data;
          initMap(data);
        })
        .catch((err) => {
          console.error(err);
        });

      function initMap(style) {
        let map = new mapboxgl.Map({
          container: "map",
          center: [116.392, 39.913],
          zoom: 14,
          bearing: -2.5,
          style: style,
        });

        map.on("mousemove", function (e) {
          var features = map.queryRenderedFeatures(e.point);

          // Limit the number of properties we're displaying for
          // legibility and performance
          var displayProperties = [
            "type",
            "properties",
            "id",
            "layer",
            "source",
            "sourceLayer",
            "state",
          ];

          var displayFeatures = features.map(function (feat) {
            var displayFeat = {};
            displayProperties.forEach(function (prop) {
              displayFeat[prop] = feat[prop];
            });
            return displayFeat;
          });

          document.getElementById("features").innerHTML = JSON.stringify(
            displayFeatures,
            null,
            2
          );
        });
      }
    </script>
  </body>
</html>
